ReefLady
Aquarium Advice FINatic
I totally agree that this would be the method of "choice" on some of the more delicate shippers (capnella, leathers, etc.).Instead, why not super glue or rubber band the rock to a piece of styrofoam so that it stays under water the whole time as well as performs as a cushion..
If you don't have Chaeto. (I won't have any soon, if mine continues to refuse to grow ), then shredded plastic strips in the water work well as a cushion also.
Now, if I could just find a cheap plastic source, and an easy way to shred it.